682928621 has 2 divisors, whose sum is σ = 682928622. Its totient is φ = 682928620.

The previous prime is 682928591. The next prime is 682928663. The reversal of 682928621 is 126829286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680479396 + 2449225 = 26086^2 + 1565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-682928621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (682922621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341464310 + 341464311.

It is an arithmetic number, because the mean of its divisors is an integer number (341464311).

Almost surely, 2^682928621 is an apocalyptic number.

It is an amenable number.

682928621 is a deficient number, since it is larger than the sum of its proper divisors (1).

682928621 is an equidigital number, since it uses as much as digits as its factorization.

682928621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 682928621 is about 26132.9030342976. The cubic root of 682928621 is about 880.6265428746.

The spelling of 682928621 in words is "six hundred eighty-two million, nine hundred twenty-eight thousand, six hundred twenty-one".